Yarn-tension device



A.'M. PIGEON.

YARN TENSION DEVICE.

APPLICATION FILED SEPT 19, I919.

1,385, 1 89. Patented July 19, 1921.

F161 I. FIG. I.

WITNESSES; lNVENTOR:

certain new of a yarn tension device conveniently UNITED STATES PATENT oFFicE.

Specification of Letters Patent.

Patented July 19, 1921.

Application filed September 19, 1919. Serial No. 324,888.

T 0 all whom it may concern:

Be it known a citizen of the United States, residing at orristown, in the county of Montgomery and State of Pennsylvania, have invented and useful Improvements in Yarn-Tension Devices, whereof the following is a specificatiom'reference being had to the accompanying drawings.

The invention relates to yarn tension devices useful in connection with knitting or sewing machinery.

he invention relates more particularly to that type of tension devices in which the desired pull upon the yarn is obtained by passing the "same between yieldingly opposed tension disks.

Heretofore, in the employment of tension devices of the general type above outlined, the arrangement was such that the disks remained perfectly stationary in so far as rotation is concerned, so that wear was necessarily restricted to portions ofthe disks instead of bein evenldistributed over their entire sur aces. uch localized wear eventually resulted in the formation of interfering projections or cutting edges which prevented the proper passa e of the yarn, andoften caused breakage thereof.

In order to overcome these objections, I have devised a simple'means whereby the effective contact area between the tension disks and the yarn is not only increased, but the former positivel rotated so that wear is evenly distribute and the passe of the thread greatly facilitated notwit standing the constant tension thereon.

The structure by which these ends are attained will be better understood from the detailed description which follows:

In the drawings, Figure 1 is a front yliew 1 ustratlng my invention, and

Fig. 2, 1s, for the most part a side elevation of the structure, certain portions being however shown in section to facilitate the understanding of important details.

- The device comprises a bracket 1, havin near its lower end an integral boss 2, whic is centrally bored to receive the re uced end of a stud, 3. The front face of the boss 2, is slightly recessed as at 4, to form aseat for one. end of a bushing 5, preferably of rcelain. This bushing is retained in pl ce throughthe cooperation of the shoulder 6,

of the stud, and the assembl ge fixed by that I, ALBERT M. PIGEGN, b

- of travel.

means of a set screw 7, threaded into the oss.

F reely mounted upon the porcelain bushing 5, are a pair of opposed tension disks 8 and 9, which are yleldingly pressed toward each other and against the front face of the boss, 2, by a coiled compression spring 10. Said spring is interposed between a washer 11, bearing directly against the outer tension disk 8, and a thumb nut 12, threaded upon the outer end of the stud 3. By this arrangement, the compressive force exerted upon the tension disks by the spring, may be very minutely adjusted. Associated with the thumb nut 12, is a jam nut 13,

through the aid of which the former may be locked against displacement upon the stud 3, after the desired adjustment is obtained.

After passing tangentially between the disks 8 and 9, at one side, (see Fig. 1,) the urn, indicated in the drawings by the letter is diverted at. a point beyond, about a reguide member 15, and re-directed so as to repass-between the disks in a like manner at the opposite side. In' shape the reguide member 15 closely resembles a spool having a concaved surface, as clearl shown. The center of the curvature, it wi l be seen from Fig. 2, lies in the plane of the meeting faces 0; the tension disks 8 and 9, as a consequence o tained properly centralized where it is caused to reverse its direction Member 15, may be either stationary or freely rotatable about an axial stud screw 17, and like the bushing 5, is preferably constructed of a non-corrosive material such as porcelain or the like.

In its passage to and from the disks 8 and 9, the yarn is lets 18 and 19, set in a lateral extension 20, formin part of the bracket 1. From Fig. 1, it will be observed that these eyelets are so s aced, that by cooperation with the s 001 e ement 15, the oppositely moving portions of the yarn are guided in absolute paral- (lielifim as they pass between the tension is s.

of the spring at the point guided through separate eye- In operatiomthe yarn Y, fed from a bobbin or other source of supply, (not shown) is passed, in the direction of the arrow 1n Fig. 1, through the eyelet 17, and thence between the tension disks 8 and 9, at the left side of the illustration. Its circuit is completed by turning about the reguide member 16, repassing between the tension disks 8, and 9, upon the opposite or right hand side of the illustration, and finally through the eyelet 19, from whence it may be directed to the machine with which the tension device is adapted to be associated. It is to be especially noted that by this arrangement, the tension disks are positively set into rotation and the attendant slippage between the disks-and the yarn in the course of their relative movement,'serves to smooth out any inequalities in the latter thereby facilitating its passage and placing the same in a better condition for feeding to the needles of the knitting or sewing machine. Furthermore, in normal operation, the disks are always evenly spaced so that the tension maintained is at all times uniform. In the event of a knot in the yarn, the disks may yield at one side to permit its passage, while the strand at the opposite side is, notwithstanding, fully engaged between the disks so that the necessary Working tension is still maintained.

Lastly, by reason of the continued rotation of the tension disks, an even distribution of the wear is also effected thereby preventing the formation of any cutting projections or edges which might catch the yarn.

Having thus described my invention, I

1. A yarn tension device comprising a pair of yieldingly opposed tension disks; and means located beyond said disks, whereby the yarn, after having passed tangentially between the disks at one side, is reversed in the direction of its travel and regnided to repass in a like manner between the disks at the opposite side.

2. A yarn tension device comprising a pair of yieldingly opposed, freely rotatable, tension disks; and a spool shaped element located beyond said disks about which the yarn, after having passed tangentially bethe opposite side; and a pair of guide eyelets adapted for cooperation with the spool element in maintaining the oppositely moving portions of the yarn'in parallelism as they pass between the tension disks.

In testimony whereof, I have hereunto signed my name at Philadelphia, Pennsylvania, thisseventeenth day of September,

ALBERT M. PIGEON. Witnesses:

JAMES H. BELL, E. L. FULLERTON. 

